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Export 11 ingredients for grocery delivery
Step 1
PreparationFor horseradish sour cream: Whisk potatoes, if using, sour cream, horseradish, dill, parsley, and lemon juice in a small bowl; season with salt and pepper.
Step 2
For assembly: Spread horseradish sour cream on bread and top with smoked salmon, radishes, roe, if using, dill, and parsley. Season with pepper.